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Finding the Fourth Proportional to 76,936.88, 115,404.12 and 39,475.33

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Solution

The fourth proportional to 76,936.88, 115,404.12 and 39,475.33 is: 59,212.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,936.88 : 115,404.12 = 39,475.33 : x
  2. Step 2: Convert to fraction form
    76,936.88/115,404.12 = 39,475.33/x
  3. Step 3: Cross multiply
    76,936.88x = 115,404.12 × 39,475.33
  4. Step 4: Simplify right side
    76,936.88x = 4,555,615,720.36
  5. Step 5: Solve for x
    x = 4,555,615,720.36/76,936.88
  6. Step 6: Final answer
    x = 59,212.38

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.